- Sabertooths and the ice age, a nonfiction companion to Magic tree house #7: Sunset of the sabertooth, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Dragon of the red dawn, Magic tree house merlin missions series, book 9., Mary Pope Osborne
- American revolution, a nonfiction companion to Revolutionary War on Wednesday, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Horse heroes, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Magic tree house, Mary Pope Osborne, Books 40 & 41
- Magic tree house collection, Mary Pope Osborne, Books 38 & 39
- Magic tree house, Mary Pope Osborne, Books 48 & 49
- Tonight on the titanic, Magic Tree House Series, Book 17., Mary Pope Osborne
- Afternoon on the amazon, Magic Tree House Series, Book 6., Mary Pope Osborne
- Dinosaurs, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Blizzard of the blue moon, Magic tree house merlin missions series, book 8., Mary Pope Osborne
- Sabertooths and the Ice Age, a nonfiction companion to Sunset of the sabertooth, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- A ghost tale for christmas time, Magic tree house merlin missions series, book 16., Mary Pope Osborne
- Leonardo da Vinci, a nonfiction companion to Monday with a mad genius, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Dinosaurs before dark, Magic Tree House Series, Book 1., Mary Pope Osborne
- Soccer, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Sunset of the sabertooth, Magic Tree House Series, Book 7., Mary Pope Osborne
- Mary Pope Osborne's Magic tree house, [vol.] 02, the knight at dawn : the graphic novel, adapted by Jenny Laird ; with art by Kelly & Nichole Matthews
- Dog heroes, a nonfiction companion to Dogs in the dead of night, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Leonardo da Vinci, a nonfiction companion to Magic tree house #38: Monday with a mad genius, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Carnival at candlelight, Magic tree house merlin missions series, book 5., Mary Pope Osborne
- Twisters and other terrible storms, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Dogsledding and extreme sports, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- Rags and riches, kids in the time of Charles Dickens, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Dolphins and sharks, a nonfiction companion to Magic tree house #9 : Dolphins at daybreak, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Pirates, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Pirates past noon, Magic Tree House Series, Book 4., Mary Pope Osborne
- Mary Pope Osborne's Magic tree house, [vol.] 01, dinosaurs before dark : the graphic novel, adapted by Jenny Laird ; with art by Kelly & Nichole Matthews
- Season of the sandstorms, Magic tree house merlin missions series, book 6., Mary Pope Osborne
- Mummies and pyramids, a nonfiction companion to Magic tree house # 3, Mummies in the morning, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Magic tree house CD edition, Mary Pope Osborne, Books 9-16
- Sleeping Bobby, [the Brothers Grimm ; retold by] Will Osborne and Mary Pope Osborne ; illustrated by Giselle Potter
- Knights and castles, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Summer of the sea serpent, Magic tree house merlin missions series, book 3., Mary Pope Osborne
- Camp time in california., Mary Pope Osborne
- Dolphins and sharks, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Day of the dragon king, Magic Tree House Series, Book 14., Mary Pope Osborne
- Rain forests, a nonfiction companion to Afternoon on the Amazon, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Dark day in the deep sea, Magic tree house merlin missions series, book 11., Mary Pope Osborne
- Christmas in camelot, Magic tree house merlin missions series, book 1., Mary Pope Osborne
- Viking ships at sunrise, Magic Tree House Series, Book 15., Mary Pope Osborne
- Vikings, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Carlo Molinari
- The knight at dawn, Magic Tree House Series, Book 2., Mary Pope Osborne
- Leprechauns and Irish folklore, a nonfiction companion to Leprechaun in late Winter, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Penguins and Antarctica, a nonfiction companion to Eve of the emperor penguins, by Mary Pope Osborne and Natalie Pope Boyce ; illustrated by Sal Murdocca
- Sunlight on the snow leopard, Magic tree house series, book 36., Mary Pope Osborne
- Titanic, by Will Osborne and Mary Pope Osborne ; illustrated by Sal Murdocca
- Lions at lunchtime, Magic Tree House Series, Book 11., Mary Pope Osborne
- Haunted castle on hallows eve, Magic tree house merlin missions series, book 2., Mary Pope Osborne
- Eve of the emperor penguin, Magic tree house merlin missions series, book 12., Mary Pope Osborne